The youngest member of Kacey's family, Momo Stevens is considered as their "little angel" of their home. After her older sister ran away from home after a feud with her father, she became very worried to her.

Until one day, a fire struck in their apartment when Momo was on her way home, and her parents are being killed in it. After the accident, she had learned how to live by herself, by living in an orphanage, and currently works as a part-time in a restaurant located at her city, and slowly growing up. On the other note: Her only wish is to reunite her sister.